Wingless sleep sack



FIG. 1 is a front view of a wingless sleep sack, in accordance with our design;

FIG. 2 is a back view thereof;

FIG. 3 is a first side view thereof;

FIG. 4 is a second side view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a front view of a wingless sleep sack, in accordance with our design;

FIG. 8 is a back view thereof;

FIG. 9 is a first side view thereof;

FIG. 10 is a second side view thereof;

FIG. 11 is a top view thereof; and,

FIG. 12 is a bottom view thereof. 

CLAIM The ornamental design for a wingless sleep sack, as shown and described. 